[freebeard]

I still think CO2 is small potatoes. I am fascinated (in a Spock-like way) by intermediate axis rotation, the Tennis Racket Paradox (a one-time Soviet space secret), and it starts with that:

https://www.youtube.com/watch?v=1UJKZTjGCss

The Earth isn't a sphere if you look at the gravitation map.